The different types of appraisals which ACI provides are listed below:

Desktop Appraisal

A desktop appraisal is one which does not include any inspection of the aircraft or review of its maintenance records. It is based upon assumed aircraft condition and maintenance status or information provided to the appraiser or from the appraiser's own database. A desktop appraisal would normally provide a value for a mid-time, mid-life aircraft.

Extended Desktop Appraisal

An extended desktop appraisal is one which is still characterized by the absence of any on-site inspection of the aircraft or its maintenance records, but does include consideration of maintenance status information that is provided to the appraiser from the client, aircraft operator, or in the case of a second opinion, possibly from another appraiser's report. An extended desktop appraisal would normally provide a value that includes adjustments from the mid-time, mid-life baseline to account for the actual maintenance status of the aircraft.

Full Appraisal

A full appraisal is one that includes an inspection of the aircraft and its maintenance records. This inspection is aimed solely at determining the overall condition of the aircraft and records to support the value opinions of the appraiser, and would not, for example, include opening of inspection panels on the aircraft or a detailed review of record archives. A full appraisal would normally provide a value that includes adjustments from the mid-time, mid-life baseline to account for the actual maintenance status of the aircraft, and possibly other adjustments to reflect the findings of the inspection of the aircraft and its records.

Comprehensive Appraisal

A comprehensive appraisal is one that includes a detailed inspection of the aircraft and records. Sufficient detail is required, for example, to insure that the records are in sufficiently good order to allow for the re-registration of the aircraft in a different country.

Financial Appraisal

A financial appraisal is one that determines the value of an aircraft to an investor based upon the income earning potential from its lease and residual value. A financial appraisal may be done in conjunction with either desktop or full appraisals.